[Koha] Catalog Search Relevance Ranking

[Michael Kuhn]

Hi Joel

 > Can anyone point me in the direction of a resource that will explain
 > how Koha determines relevance in catalog searches? Some of my
 > libraries have been asking about it since it's the default sort
 > option.

I would suggest to start, as usual, with the Koha manual:
* https://koha-community.org/manual/17.05/html/13_searching.html

The actual relevance ranking is done within Zebra, you will find the 
"Zebra - User's Guide and Reference" here (unfortunately the link to 
this guide in the Koha manual is dead):
* http://www.indexdata.com/zebra/doc/

For relevance ranking start here:
* http://www.indexdata.com/zebra/doc/administration-ranking.html

Hope this helps.

Best wishes: Michael
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